CN102000620B - Integrated crushing tooth of grading crusher and manufacturing method thereof - Google Patents
Integrated crushing tooth of grading crusher and manufacturing method thereof Download PDFInfo
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- CN102000620B CN102000620B CN2010105233033A CN201010523303A CN102000620B CN 102000620 B CN102000620 B CN 102000620B CN 2010105233033 A CN2010105233033 A CN 2010105233033A CN 201010523303 A CN201010523303 A CN 201010523303A CN 102000620 B CN102000620 B CN 102000620B
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Abstract
The invention discloses the integrated crushing tooth of a grading crusher and a manufacturing method thereof, which is characterized in that the integrated crushing tooth takes alloy high manganese steel as a main raw material and adopts an integrated lost foam casting process; the center of the integrated crushing tooth (3) is provided with a tooth roller hole (5) with a key slot (4); the outer wall of the integrated crushing tooth (3) is provided with an outer circular tooth (6); and a hard alloy bar (2) is cast on the outer circular tooth (6). The integrated crushing tooth manufactured by the invention has the advantages of good strength and toughness, and higher hardness and abrasion resistance, can carry out the cutting machining and is suitable for manufacturing the crushing tooth of a tooth sleeve type grading crusher.
Description
Technical field
The present invention relates to the crushing teeth of disintegrating machine, be specifically related to whole crushing teeth of a kind of Sizing Crusher and preparation method thereof.
Background technology
As everyone knows, Sizing Crusher mainly is applicable to thick, the medium crushing of industry fragility lump materials such as coal, metallurgy, building materials, chemical industry.Particularly, use three crusher machine raw coal to need only through deironing, removal of impurities, need not remove cash, just can directly carry out fragmentation at coal industry, the material that fragmentation goes out, epigranular, it is low to cross degradation rate, thereby has simplified coal preparation technique, has reduced investment and production cost.Therefore, since throwing in market, received numerous users' favorable comment.
But degree of depth exploitation along with coal resources; Cause the taste of coal to reduce; The dressing of coal by washing pressure of coal increases, and particularly evident is contains that the cash amount increases, the hardness increase of raw coal brings unprecedented challenge, and this just requires the crushing teeth of Sizing Crusher should have enough wearabilities; Have again than high toughness, also will have workability and convertibility simultaneously.Undoubtedly, improve the anti-wear performance of crushing teeth, the hardness of material therefor will increase; But raising along with hardness; Toughness just will inevitably descend, and bringing bigger problem simultaneously is that the cut difficulty strengthens, and the crushing teeth of high rigidity material at all can't metalworking.Up to the present, we can say that the selection of the crushing teeth of Sizing Crusher, preparation method also really are not resolved, its key of problem is to be difficult to solve the wearability of material and the contradiction between toughness and this three of workability.If adopt the method for compromise, the three all makes some concessions and sacrifice, perhaps can address this problem.
Summary of the invention
The objective of the invention is to: whole crushing teeth of a kind of Sizing Crusher and preparation method thereof is provided; Tooth shell type Sizing Crusher crushing teeth is produced according to this preparation method; Whole crushing teeth intensity and good toughness, hardness and wearability are also higher, and can also carry out cut.
The technical solution adopted for the present invention to solve the technical problems is: this integral body crushing teeth is main material with the high manganese steel alloy; Adopt the monoblock cast of disappearance mould; There is the discaling roll hole of band keyway at the center of whole crushing teeth; Knuckle-tooth outside on the outer wall of whole crushing teeth, having, imbedding hard alloy bars on the outer knuckle-tooth.
Wherein, the mass fraction of the chemical composition of high manganese steel alloy is: C 1.21%～1.30%, Si 0.58%～0.76%, S 0.04%～0.05%, P 0.04%～0.06%, Mn 13.12%～13.74%, Cr 1.87%～2.16%, MO 0.45%～0.57%, V 0.14%～0.19%, Ti 0.15%～0.21%, RE 0.39%～0.49%, B 0.42%～0.51%, Fe 79.96%～81.59%.
Wherein, castingin YG20 hard alloy bar on the outer knuckle-tooth of whole crushing teeth, this alloy bar is an outsourcing piece, and diameter is 4～5mm, and the mass fraction of its chemical composition is: WC 80%, binding agent 20%, performance is: density/t.m
-313.4～13.8, bending strength/Mpa 2400～2480, hardness (HRA) 80～83.5.
Wherein, the end of hard alloy bar welding unit nail.
Wherein, the preparation method of this integral body crushing teeth may further comprise the steps:
(1) processing procedure of hard alloy bar: at first, be that the YG20 hard alloy bar of 4～5mm cuts into the identical segment of length, at an end weld diameter of each segment alloy bar unit's nail than the little 1mm of alloy bar with the outsourcing diameter; Then, hand-held unit nail one end is used the emery cloth sanding with hard alloy bar, cleans with gasoline again, coats the copper-bath of mass concentration 30-50%, makes its surface generate protective layer;
(2) production process of high manganese steel alloy: ordinary scrap steel, the pig iron are added melting in the intermediate frequency furnace, and the molten clear back of molten steel adds ferromanganese, ferrochrome, molybdenum-iron, ferrosilicon, fully fusing back adjustment composition; After composition is qualified; Temperature is increased to 1580 ℃～1600 ℃ skims, add that to account for the molten steel quality be 0.30% aluminium block deoxidation, and add the rare earth that accounts for molten steel quality 0.90%～1.10%, 0.40%～0.50% ferrotianium, 0.30%～0.40% vanadium iron in advance in the bottom of pouring ladle; Its granularity is less than 6mm; And on above-mentioned material, cover iron filings or steel plate, the processing of going bad of the molten steel after adopting the method that pours in the bag to deoxidation was left standstill after the manual stirring 2～3 minutes; When molten steel temperature is reduced to 1460 ℃～1470 ℃, pour in the disappearance mould;
(3) lost foam casting process: at first, make the mould of whole crushing teeth polystyrene foamed plastics mould,, require high, any surface finish of foam mould dimensional accuracy made from this Mold Making foam mould with aluminium alloy; Then, on each flank of tooth of the outer knuckle-tooth of whole crushing teeth foam mould, boring two diagonal angles of system, to arrange diameters be the aperture of 4～5mm, and adjacent aperture position staggers, about the dark 5mm of aperture depth ratio tooth depth size; Then, in aperture, insert the also treated YG20 hard alloy bar that is cut into pieces, the unit of welding on hard alloy bar nail exposes to foam mould, and its effect is to guarantee that hard alloy bar is unshift when the disappearance mould gasifies in casting process; Secondly, paste cast gate and rising head, apply fireproof coating, the entering temperature is 50 ℃ drying room oven dry; At last, the integral body disappearance mould of oven dry is imbedded in the shot sand, but what insert at the bore area of whole crushing teeth foam mould is quartz sand; Make the inside and outside cooling velocity of foundry goods different; In vibration frequency is that 50～60Hz, amplitude are that 1～2mm, acceleration are to carry out jolt ramming in 1～2g parameter area, open vacuum pump before the cast, and the negative-pressure vacuum degree is set to 0.06Mpa; When molten steel temperature is reduced to 1460 ℃～1470 ℃, pour in the disappearance mould; In whole casting process, be 1.00%～1.30% B with accounting for the molten steel quality
4The C particle adds with stream from start to finish equably, forms whole crushing teeth foundry goods with this;
(4) heat treatment process: after the cast, when treating that whole crushing teeth foundry goods is cooled to 1000 ℃～1030 ℃, the shot sand in the sandbox is emitted; With driving whole crushing teeth foundry goods is hung out from disappearance sand case; And move to the top in pond rapidly, about, the front and back four direction, jet hardening on knuckle-tooth outside the whole crushing teeth foundry goods of temperature at 990 ℃～1000 ℃; Remove after the room temperature water, rising head, be heated to 220 ℃ of insulation 2h air cooling of coming out of the stove in the chamber type electric resistance furnace of packing into.
The present invention has the following advantages: (1) crushing teeth adopts the monoblock cast of disappearance mould; Need not withdrawing pattern; And dimensional accuracy is high, few, any surface finish of allowance, has overcome some defectives of Castingother method cast-in-block, does not also need the method build-up wear-resistant material on crushing teeth that welds by hand simultaneously; Both alleviate labour intensity, improved the service life of whole crushing teeth again greatly; (2) whole crushing teeth employing high manganese steel alloy is a main material, and this material initial hardness is high, and the obdurability of matrix is good, and the YG20 hard alloy bar of castingin forms the hard phase, has reached the good again effect of good hardness toughness; (3) whole crushing teeth of the present invention adopts lost-foam casting method and Technology for Heating Processing, and outer surface is used shot sand, and endoporus is used quartz sand; Having reached same foundry goods different parts has different hardness numbers, and the discaling roll hole in the whole crushing teeth needs processing, and its hardness is HRC 30～35; The outer knuckle-tooth of whole crushing teeth need not processed; Its matrix hardness is HRC 40～45, has both guaranteed machinability, and higher wearability is arranged again; (4) the hard alloy bar requirement of whole crushing teeth castingin of the present invention is few, in light weight, and cost is low, and difficult drop-off in the course of work is effective; (5) whole crushing teeth of the present invention adopts the method for afterheat of casting Quenching Treatment, has both reduced the foundry goods decarburization, has practiced thrift the required energy of post bake again.
Description of drawings
Fig. 1 is B one B cross-sectional schematic among the whole crushing teeth Fig. 2 of the present invention.
Fig. 2 for A among the whole crushing teeth Fig. 1 of the present invention to the view sketch map.
Among the figure: 1 is unit's nail, and 2 is hard alloy bar, and 3 is whole crushing teeth, and 4 is keyway, and 5 is the discaling roll hole, and 6 is outer knuckle-tooth.
The specific embodiment
Further specify technical solution of the present invention below in conjunction with embodiment, but can not be interpreted as that these instances are the restrictions to technical scheme.
Like Fig. 1, shown in 2; This integral body crushing teeth is main material with the high manganese steel alloy, adopts the monoblock cast of disappearance mould, and there is the discaling roll hole 5 of band keyway 4 at the center of whole crushing teeth 3; Knuckle-tooth 6 outside on the outer wall of whole crushing teeth 3, having, imbedding hard alloy bars 2 on the outer knuckle-tooth 6.
Wherein, the mass fraction of the chemical composition of high manganese steel alloy is: C 1.21%～1.30%, Si 0.58%～0.76%, S 0.04%～0.05%, P 0.04%～0.06%, Mn 13.12%～13.74%, Cr 1.87%～2.16%, MO 0.45%～0.57%, V 0.14%～0.19%, Ti 0.15%～0.21%, RE 0.39%～0.49%, B 0.42%～0.51%, Fe 79.96%～81.59%.
Wherein, castingin YG20 hard alloy bar on the outer knuckle-tooth of whole crushing teeth, this alloy bar is an outsourcing piece, and diameter is 4～5mm, and the mass fraction of its chemical composition is: WC 80%, binding agent 20%, performance is: density/t.m
-313.4～13.8, bending strength/Mpa 2400～2480, hardness (HRA) 80～83.5.
Wherein, the end of hard alloy bar 2 welding unit nail 1.
Embodiment 1 and 2: produce the whole crushing teeth of FP5008A and FP5012A Sizing Crusher, this integral body crushing teeth is made according to following steps:
(1) processing procedure of hard alloy bar: at first, be that the YG20 hard alloy bar of 4～5mm cuts into the identical segment of length with the outsourcing diameter, at each segment
One end weld diameter of alloy bar is than unit's nail of the little 1mm of alloy bar; Then, hand-held unit nail one end is used the emery cloth sanding with hard alloy bar, cleans with gasoline again, coats the copper-bath of mass concentration 30-50%, makes its surface generate protective layer;
(2) production process of high manganese steel alloy: ordinary scrap steel, the pig iron are added melting in the intermediate frequency furnace, and the molten clear back of molten steel adds ferromanganese, ferrochrome, molybdenum-iron, ferrosilicon, fully fusing back adjustment composition; After composition is qualified; Temperature is increased to 1580 ℃～1600 ℃ skims, add that to account for the molten steel quality be 0.30% aluminium block deoxidation, and add the rare earth that accounts for molten steel quality 0.90%～1.10%, 0.40%～0.50% ferrotianium, 0.30%～0.40% vanadium iron in advance in the bottom of pouring ladle; Its granularity is less than 6mm; And on above-mentioned material, cover iron filings or steel plate, the processing of going bad of the molten steel after adopting the method that pours in the bag to deoxidation was left standstill after the manual stirring 2～3 minutes; When molten steel temperature is reduced to 1460 ℃～1470 ℃, pour in the disappearance mould;
(3) lost foam casting process: at first, make the mould of whole crushing teeth polystyrene foamed plastics mould,, require high, any surface finish of foam mould dimensional accuracy made from this Mold Making foam mould with aluminium alloy; Then, on each flank of tooth of the outer knuckle-tooth of whole crushing teeth foam mould, boring two diagonal angles of system, to arrange diameters be the aperture of 4～5mm, and adjacent aperture position staggers, about the dark 5mm of aperture depth ratio tooth depth size; Then, in aperture, insert the also treated YG20 hard alloy bar that is cut into pieces, the unit of welding on hard alloy bar nail exposes to foam mould, and its effect is to guarantee that hard alloy bar is unshift when the disappearance mould gasifies in casting process; Secondly, paste cast gate and rising head, apply fireproof coating, the entering temperature is 50 ℃ drying room oven dry; At last, the integral body disappearance mould of oven dry is imbedded in the shot sand, but what insert at the bore area of whole crushing teeth foam mould is quartz sand; Make the inside and outside cooling velocity of foundry goods different; In vibration frequency is that 50～60Hz, amplitude are that 1～2mm, acceleration are to carry out jolt ramming in 1～2g parameter area, open vacuum pump before the cast, and the negative-pressure vacuum degree is set to 0.06Mpa; When molten steel temperature is reduced to 1460 ℃～1470 ℃, pour in the disappearance mould; In whole casting process, be 1.00%～1.30% B with accounting for the molten steel quality
4The C particle adds with stream from start to finish equably, forms whole crushing teeth foundry goods with this;
(4) heat treatment process: after the cast, when treating that whole crushing teeth foundry goods is cooled to 1000 ℃～1030 ℃, the shot sand in the sandbox is emitted; With driving whole crushing teeth foundry goods is hung out from disappearance sand case; And move to the top in pond rapidly, about, the front and back four direction, jet hardening on knuckle-tooth outside the whole crushing teeth foundry goods of temperature at 990 ℃～1000 ℃; Remove after the room temperature water, rising head, be heated to 220 ℃ of insulation 2h air cooling of coming out of the stove in the chamber type electric resistance furnace of packing into.
Claims (2)
1. the whole crushing teeth of a Sizing Crusher; There is the discaling roll hole (5) of band keyway (4) at the center of whole crushing teeth (3); Knuckle-tooth (6) outside on the outer wall of whole crushing teeth (3), having; This integral body crushing teeth is main material with the high manganese steel alloy, adopts the monoblock cast of disappearance mould, and outer knuckle-tooth (6) is gone up imbedding hard alloy bars (2); It is characterized in that: wherein, the mass fraction of the chemical composition of high manganese steel alloy is: C 1.21%～1.30%, Si 0.58%～0.76%, S 0.04%～0.05%, P 0.04%～0.06%, Mn 13.12%～13.74%, Cr 1.87%～2.16%, MO 0.45%～0.57%, V 0.14%～0.19%, Ti 0.15%～0.21%, RE 0.39%～0.49%, B 0.42%～0.51%, Fe 79.96%～81.59%.
2. the preparation method of the whole crushing teeth of a kind of Sizing Crusher according to claim 1 is characterized in that this preparation method may further comprise the steps:
(1) processing procedure of hard alloy bar: at first, be that the YG20 hard alloy bar of 4～5mm cuts into the identical segment of length with the outsourcing diameter, at each segment
One end weld diameter of alloy bar is than unit's nail of the little 1mm of alloy bar; Then, hand-held unit nail one end is used the emery cloth sanding with hard alloy bar, cleans with gasoline again, coats the copper-bath of mass concentration 30-50%, makes its surface generate protective layer;
(2) production process of high manganese steel alloy: ordinary scrap steel, the pig iron are added melting in the intermediate frequency furnace, and the molten clear back of molten steel adds ferromanganese, ferrochrome, molybdenum-iron, ferrosilicon, fully fusing back adjustment composition; After composition is qualified; Temperature is increased to 1580 ℃～1600 ℃ skims, add that to account for the molten steel quality be 0.30% aluminium block deoxidation, and add the rare earth that accounts for molten steel quality 0.90%～1.10%, 0.40%～0.50% ferrotianium, 0.30%～0.40% vanadium iron in advance in the bottom of pouring ladle; Its granularity is less than 6mm; And on above-mentioned material, cover iron filings or steel plate, the processing of going bad of the molten steel after adopting the method that pours in the bag to deoxidation was left standstill after the manual stirring 2～3 minutes; When molten steel temperature is reduced to 1460 ℃～1470 ℃, pour in the disappearance mould;
(3) lost foam casting process: at first, make the mould of whole crushing teeth polystyrene foamed plastics mould,, require high, any surface finish of foam mould dimensional accuracy made from this Mold Making foam mould with aluminium alloy; Then, on each flank of tooth of the outer knuckle-tooth of whole crushing teeth foam mould, boring two diagonal angles of system, to arrange diameters be the aperture of 4～5mm, and adjacent aperture position staggers, about the dark 5mm of aperture depth ratio tooth depth size; Then, in aperture, insert the also treated YG20 hard alloy bar that is cut into pieces, the unit of welding on hard alloy bar nail exposes to foam mould, and its effect is to guarantee that hard alloy bar is unshift when the disappearance mould gasifies in casting process; Secondly, paste cast gate and rising head, apply fireproof coating, the entering temperature is 50 ℃ drying room oven dry; At last, the integral body disappearance mould of oven dry is imbedded in the shot sand, but what insert at the bore area of whole crushing teeth foam mould is quartz sand; Make the inside and outside cooling velocity of foundry goods different; In vibration frequency is that 50～60Hz, amplitude are that 1～2mm, acceleration are to carry out jolt ramming in 1～2g parameter area, open vacuum pump before the cast, and the negative-pressure vacuum degree is set to 0.06Mpa; When molten steel temperature is reduced to 1460 ℃～1470 ℃, pour in the disappearance mould; In whole casting process, be 1.00%～1.30% B with accounting for the molten steel quality
4The C particle adds with stream from start to finish equably, forms whole crushing teeth foundry goods with this;
(4) heat treatment process: after the cast, when treating that whole crushing teeth foundry goods is cooled to 1000 ℃～1030 ℃, the shot sand in the sandbox is emitted; With driving whole crushing teeth foundry goods is hung out from disappearance sand case; And move to the top in pond rapidly, about, the front and back four direction, jet hardening on knuckle-tooth outside the whole crushing teeth foundry goods of temperature at 990 ℃～1000 ℃; Remove after the room temperature water, rising head, be heated to 220 ℃ of insulation 2h air cooling of coming out of the stove in the chamber type electric resistance furnace of packing into.
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| CN102000620B true CN102000620B (en) | 2012-11-21 |
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Families Citing this family (3)
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| CN104988431A (en) * | 2015-05-27 | 2015-10-21 | 芜湖银海机械制造有限公司 | High manganese steel sieve plate for crusher and preparation method of sieve plate |
| CN106825510A (en) * | 2016-12-30 | 2017-06-13 | 常熟市电力耐磨合金铸造有限公司 | A kind of preparation technology of high abrasion castingin type composite grinding roll set |
| CN108672013A (en) * | 2018-03-29 | 2018-10-19 | 安徽马钢张庄矿业有限责任公司 | A kind of quasi- static pressure flour high pressure roller surface structure |
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| JP2005305390A (en) * | 2004-04-26 | 2005-11-04 | Hitachi Furukawa Kenki Kk | Hammer knife for crushing device |
| CN101191180A (en) * | 2006-11-21 | 2008-06-04 | 鞍钢集团矿业公司 | Ultra-high performance wearable high-manganese steel and producing method thereof |
| CN201154315Y (en) * | 2007-12-28 | 2008-11-26 | 中天仕名科技集团有限公司 | Bearing anvil enchasing wear-resisting alloy |
| CN101717895A (en) * | 2009-12-25 | 2010-06-02 | 淮阴工学院 | Crusher hammerhead cast of steel bond hard alloy bar and casting method of vanishing mould thereof |
| CN101850285A (en) * | 2010-06-13 | 2010-10-06 | 淮阴工学院 | Combined position board hammer of reaction crusher capable of rapidly changing wear position and manufacturing method thereof |
| CN101862694A (en) * | 2010-06-13 | 2010-10-20 | 淮阴工学院 | Combined type mechanically crushing machine hammer and manufacturing method thereof |
-
2010
- 2010-10-28 CN CN2010105233033A patent/CN102000620B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005305390A (en) * | 2004-04-26 | 2005-11-04 | Hitachi Furukawa Kenki Kk | Hammer knife for crushing device |
| CN101191180A (en) * | 2006-11-21 | 2008-06-04 | 鞍钢集团矿业公司 | Ultra-high performance wearable high-manganese steel and producing method thereof |
| CN201154315Y (en) * | 2007-12-28 | 2008-11-26 | 中天仕名科技集团有限公司 | Bearing anvil enchasing wear-resisting alloy |
| CN101717895A (en) * | 2009-12-25 | 2010-06-02 | 淮阴工学院 | Crusher hammerhead cast of steel bond hard alloy bar and casting method of vanishing mould thereof |
| CN101850285A (en) * | 2010-06-13 | 2010-10-06 | 淮阴工学院 | Combined position board hammer of reaction crusher capable of rapidly changing wear position and manufacturing method thereof |
| CN101862694A (en) * | 2010-06-13 | 2010-10-20 | 淮阴工学院 | Combined type mechanically crushing machine hammer and manufacturing method thereof |
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